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The S:MAX range of equipment solutions are high efficiency wet screening systems applied where there is a requirement for efficient liquid/solid separation. The S:MAX range can be applied to process a variety of materials including: Raw Sludge, Surplus Activated Sludge, Septic Tank Sludge, Digester Feed Sludge and Digestate.

Return on Investment Return on Investment

Removing rag at every stage of the downstream process creates huge cost savings.

The effective removal of rag and grit can save operators money on unnecessary maintenance and downtime.

Reduced solids passing through pumps, tanks and centrifuges reduces wear and the requirement for unnecessary maintenance.

Safety Safety

The S:MAX is specifically designed with the health and safety of its operators and users in mind. This includes design features that improve health and safety in daily operations, plant inspections and routine maintenance.

The S:MAX has numerous safety features including, isolator systems, emergency stops, hydrostatic sensors, guarding, handrails, temperature sensors and a Traffic Light system
to inform operators of unit readiness and status.

Efficiency Efficiency

S:MAX processes liquids such as high dry solid sludges in the shortest possible time, minimizing power and reducing tanker downtime and costs. By processing at the fastest rate possible, with no requirement for a reception tank, tanker assets are optimised and transportation costs minimised.

The automated back wash system eliminates the requirement for an operator to be on standby.

Its design maximizes the application of energy into the vibrating screen deck, ensuring maximum effect while minimizing noise.

S:MAX can be fully automated via integration with site level control systems, and via addition of a tanker reception control system that also allows measurement of flow rate, volume, and dry solids for quality purposes

Performance Performance

Using the latest high-efficiency sludge screening technology, the performance of the S:MAX is maintained through its ability to receive material directly onto the screen, by operating two feed inlets, hosting an onboard booster pump and operating a unique backwash system.

By discharging directly onto the S:MAX screen, a buffer tank is no longer required.

S:MAX can easily accommodate both indigenous sludge and imported sludge.

Our integrated system can dramatically reduce the instantaneous flow rate of final effluent washing water.


Built to Last Built to Last

The highest quality components and intelligent design ensure a system that is built to last. Key design features include high wear
application screens, WIMES protective paint and a stainless steel unit all of which guarantee system longevity.

At CDEnviro we design screens for some of the toughest materials. Waste water is at the low end of the abrasion spectrum.

WIMES protective coating ensures corrosive environments do not degrade the machine.


Environment Environment

The S:MAX generates as little impact on the environment as possible, taking into consideration odour and noise levels.

Odour enclosure ensures that potential smells from sludge are contained within the screening system.

The noise level of the S:MAX will not exceed 85db.



Rapid Deployment Rapid Deployment

The S:MAX is a compact unit that is pre-wired, assembled and factory tested before leaving CDEnviro Headquarters. 

Our Project Management approach ensures that the plant is delivered fully operational and on time.

Nick Williams, Digester Manager, Severn Trent Water

“All the evidence from the first sixteen weeks of operation is that yet another area of significant cost and interruption to plant operation has been successfully dealt with by the S:MAX. We are now sending 50% less waste to landfill than was previously the case. We are also recovering a range of materials from the waste and converting them into commercial products which have uses in a variety of applications.”

Model: SRU:15

Maximum Capacity: 47 L/s at 6%DS

Water Requirement: 1.0 L/s

Power Requirement: 19.5 kW (inc. compactor)

Screening Area: 1.8 x 2.4 m

Transport Details: 1no x 40FT (Open Top or EuroLiner)

Dry Weight: 9.0 t


      Length: 5.5 m

      Width: 4.8 m

      Height: 3.3 m

Model: SRU:25

Maximum Capacity: 80 L/s at 6%DS

Water required per wash: 2.0 L/s

Power Requirement: 26 kW (inc. compactor)

Screening Area: 1.8 x 4.0 m

Transport Details: 1no x 40FT (Open Top or EuroLiner)

Dry Weight: 11.0 t


      Length: 8.0 m

      Width: 4.8 m

      Height: 3.8 m

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